android封存用户名密码

◆get SharedPreferences pref = getSharedPreferences(VocabTestMain.PREF_APPID,0);         String username = pref.getString(VocabTestMain.PREF_USERNAME, "");   ◆put SharedPreferences pref = getSharedPreferences(VocabTestMain.PREF_APPID, 0);         pref.edit().putString(VocabTestMain.PREF_USERNAME,txtName.getText().toString()).commit();